Improvement in machines for making strap-hinges



' -2'Sheets--SI1IeIeI I. I I WILLIAM J. LEWIS. J Improvement in Machinesfor Making Strap-Hinges.

N0. II4 OIQ. Patented April25.871.

nl IIIIlI LII!!!D IIIIEIIIIIIIIII im nu 2 Qu E IL L M A L L Wimprovement in Machines for Making Strap-Hinges.

Patented April 25,1871.

tanda tdaz WILLIAM J. LEWIS, or PITTsBUne, PENNSYLVANIA.

Letters-Patent No. 114,019, dated April 25, 1871..

IMPROVEMENT IN MACHINES FOR MAKING STRAP-'HINGIES-` The Schedulereferred to in these Letters Patent and maklng part of the same.

To all whomtt may concern;

Be it known that I, WILLIAM' J. LEWIS, of Pittsburg, in the county ofAllegheny and State of Penn Sylvania, have invented a new and usefulImprovement in Machine for Making Strap-Hinges; and I do hereby declarethe following tu be a full, clear, rand exact description thereof,reference being had to the accompanying drawing making a part of thisspecification, in which- I Figure 1 is a plan view of my machine; Figure2 is a sectional elevation in the line x x,

I Figure -3 is a` detached perspective view ofthe shears and bendingdevices;

Figure 4 is a side elevation of the rear or further 'side of themachine; and

it it is di'icult to make the hinge of good finish, with a good weld,and without burning the iron.A

By my improvement4 I obviate all these defects, make the hinges morerapidly with less labor, and produce a good and durable article.

To enable others skilled in the art to make and use my improvement, Iwill proceed to describe its construction and mode of operation.

The frame f may be of any suitable or convenient construction.y l

On it, by suitable bearings, I mount a driving and cam-shaft, g, towhich power may be applied by a crank or in other known suitable way.

In suitable bearings h in the opposite end of the machine is abending-spindle, It, on one end of which is a pinion, l, and ou itsopposite end is an anvil or rest, m, the upper face of which latter is alittle below and a little outside of the center of the spindle h.

v This bending-spindle It is made hollow through apart of its length,and in such hollow part a mandrel-stem, a', is arranged, with aconnection to a grooved collar, b, which is arranged ou the spindle h,the spindle being mortised, as at t', so `that room may be made for snchconnection aud for the movement of the same in sliding the mandrel-stema' in and out.

The mandrelstem a carries a mandrel, a, at its outer end of the size'tobe given t0 the eye of the hinge.

'The outer end of the spindle la is also mortised, as at c', lso as tomake room for the bending and swagiugblock a", which is rigidly attachedto the stem a.

The reciprocating or 'out-and-in motion to begiven to the stem a',mandrel a, and block a is secnred'by means of a lever,l d, which ispivoted toa xed fnlcrum, d, has a fork, c,.at one end to enter thegroove of the collar b, and at its other end ar'pin, c', which enters aspiral groove, c, in the driving-shaft g.

The spindle his caused to rotate alternately each way by means of asegmental wheel, a, which is piv oted to some fixed support, and whichmeshes into the pinion Z.

It is operated either way by a shaft, k, which leads from the cam-yoke11 in which yoke are arranged two cams o o', so that, acting alternatelyagainst opposite faces of the yoke, they shall cause the desired motionsto be imparted to the segmental -wheel n.

The yoke 1) is supported by sliding ways p' or in other suitable manner.Y

The connections of the shaft It are adjustable at each end by means ofthe slot n in the segmental wheel n and the slot la in the opposite endof the shaft It where it joins the cam-yoke p, for purposes obvious tothose `skilled in the art.

Ou the side' of the mandrel a opposite to the anvil m are arranged theshears s s', with cutting-edges of. the form to be given to that end ofthe hinge-strap which is to be bent or folded over.` Y

The stationary knife or shear s is set in a frame, g, which isadjust-ably, by means, of slots o', attached to the frame f.

The other knife or shear s is set in a rocking head, q', which latter ispivoted in the frame q, and to which the desired motions are imparted bythe use of a shaft, t, leading from a cam-yoke, y', in which operatesthe cam y.

This connection is also adjustable, as shown at t.

The yoke y is supported by the sliding way w.

On the anvil or rest fm, flushwith the .end of the spindle It, isastripper, c.

The operation is then as follows The devices being in the position shownin Iig. 1, the blank z unbent is fed in along the face of the anvil fm,between the mandrel a above and the block a," below, in between'theshears any desired distance for trimming. l

By the cam g/,yoke y', and shaftt the shears s s are put in operation totrim the blank. Then, by

the cam o, yokep, shaft k, segmental wheel n, and pinion l, the spindleIt is caused to revolve with a quick stroke, the result of which is thatthe block a" carries the end z of the blank over, folds it around themaudrel a, and lays it down on the body'of the blank back of the eye,and brings it to the form illustrated iu iig.

at the end of the strap.

5; the devices then beingv` in the position shown in iig. 3. Then, bythe spiral groove c and lever d, a` throw is given to the collar b,which carries-back with it the stem a', mandrel a, and block a, and thehingeeye is stripped off the mandrel by means of the stripper c.

By continuing the revolution of the driving-shaft g the devicesdescribed are all brought back to the original positions, their motionsbeing reversed in every case.A f

lTheY shears are opened; the spindle h is by the segmental wheel nrevolved back, and the mandrel a and block tv/"lare thrown out again, soas to be ready for a new feed. f In this way the work goes oncontinuously and with greatrapidity.`

The object of the slot n in the segmental wheel fn -is tp vary thelength of throw of the bending-block a,

- This obviously will make the male half of 'the hinge.

I also use 'the machine to bend the end of a blank to form a hinge-eyein that class of hinges in which the folded end a is not required, butmerely an eye "metallic straps generally.

It will be observed that Jie anvilm performs not only the function of aguide when the blank is being fed in, but also its proper functionthatoi'an anvil, onto which the block a, swages or forces down the two foldsor layers of the strap, so as to give a per fectly-shaped and wellformedeye.

VVhat'I claim as my invention, and desire to secure by Letters Patent,is

1. Thev combination of rotating spindle h, mandrel; a, stem and block aand a", the anvil in, and mech-` for the purposes set forth.

2. The devices of the previous claim, in combination with a stripper, e,substantially asdescribed.

3. In combination with the devices set forth in first clause of claim,the shears s s', substantially as and furthe purposes set forth.

4. Theisegmental wheel n, slotted, as at n', so as to be capable of avariable length of stroke, in combination with the spindle h, arrangedsubstantially as' described, for causing thev lat-ter to revolvealternately in opposite directions.

In testimony whereof I, the said WILLIAM J. LEWIS, have hereunto set myhand.

'WILLIAM J. LEWIS.

Witnesses:-

A. S. NICHOLSON, G. ELOHRIsTY.

I also employ it for turning eyes on the ends of i anism forreciprocating said stem, substantially as and

